Modern control and confidence for the first-generation Eclipse.
Designed specifically around the chassis layout and driving dynamics of the 1989–1994 Mitsubishi Eclipse, the Spec-S improves turn-in, body control, and stability while retaining the compliance needed for real-world street driving.
Dežru Spec-S Coilovers – 1989–1994 Mitsubishi Eclipse
The Dežru Spec-S coilover system is engineered specifically for the 1989–1994 Mitsubishi Eclipse, with spring rates and damping selected around the chassis layout, weight distribution, suspension geometry, and performance potential of the first-generation DSM platform.
Designed for drivers who use their Eclipse on the street but still enjoy spirited driving, back roads, autocross, and occasional HPDE track days, the Spec-S delivers improved stability, sharper response, and greater chassis control without sacrificing everyday usability.
The Spec-S uses digressive piston valving to provide strong low-speed chassis support during braking, turn-in, acceleration, and transitions while remaining compliant over rough pavement and surface imperfections. Rather than relying on excessive damping force to control the chassis, the suspension combines carefully selected spring rates with matched damping to produce a responsive but predictable setup.
Fixed-length damper bodies paired with a 25–50 mm adjustable lowered ride height help maintain proper suspension stroke and geometry. This preserves usable bump travel and predictable suspension behavior while giving the Eclipse a lower, more purposeful stance.
Key Features
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Digressive monotube dampers for controlled body motion, consistent damping performance, and clear steering feedback.
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Fixed-length damper bodies with 25–50 mm adjustable lowered ride height to preserve suspension geometry and usable travel.
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Adjustable damping to fine-tune rebound for daily driving, back-road use, autocross, or HPDE track events.
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400 lb/in front and 300 lb/in rear spring rates, selected around the Eclipse's chassis layout, weight distribution, suspension geometry, and intended street-performance use.
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Linear HyperCoil springs for predictable load transfer and smooth, consistent response throughout suspension travel.
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Spherical bearing upper mounts to reduce NVH while maintaining proper fitment and alignment consistency.
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Hand-built, dyno-matched pairs to ensure precise left-to-right damping consistency.
Performance Character
The Spec-S gives the first-generation Eclipse substantially greater chassis control without stripping away the compliance that makes the car enjoyable on real roads. Digressive damping provides immediate support during steering, braking, and throttle inputs while allowing the suspension to remain compliant over broken pavement and surface imperfections.
The result is an Eclipse that feels more planted, responsive, and predictable during aggressive driving while remaining comfortable enough for regular street use and longer drives.
For the 1989–1994 Mitsubishi Eclipse, the 400 lb/in front and 300 lb/in rear spring combination is selected around the chassis's weight distribution, suspension geometry, and typical driving use. The moderate difference between front and rear rates provides the additional support required at the front axle while maintaining rear compliance and mechanical grip.
The 400 lb/in front spring rate provides the support needed to control the Eclipse's front axle load while reducing excessive dive, roll, and suspension compression during aggressive braking and corner entry. The additional front spring support helps maintain suspension geometry and keeps the front suspension operating within a more controlled portion of its travel as braking and cornering loads increase.
At the rear, the 300 lb/in spring rate maintains the compliance and mechanical grip needed from the lighter rear of the chassis. The lower rear rate allows the suspension to follow uneven pavement effectively while keeping the rear predictable during mid-corner bumps, throttle transitions, and high-speed direction changes.
The 400/300 spring combination creates a balanced street-performance setup that provides meaningful front-end support without making the rear unnecessarily stiff. This helps maintain predictable handling at the limit while improving steering response, transitional control, and overall chassis composure.
Just as importantly, the dampers are specifically valved around these spring rates. Spring rate and damping work together as a system, allowing the Spec-S to provide strong body control without relying on excessive damping that can make a street-driven suspension feel harsh or unsettled.
On the street, the Eclipse remains compliant and usable. During spirited driving, the additional support becomes much more apparent, with reduced pitch and roll, more immediate steering response, and greater stability through transitions. For autocross or occasional HPDE use, the combination provides considerably greater chassis control without turning the car into a dedicated track setup.
Who This Is For
- 1989–1994 Eclipse owners who want sharper handling without sacrificing street usability
- Drivers who regularly enjoy spirited street and back-road driving
- Owners looking for better body control, steering response, and high-speed stability
- Street-focused cars that occasionally see autocross or HPDE use
- Drivers who want a meaningful performance upgrade without the harshness of a track-focused suspension
- Enthusiasts who want spring rates and damping selected specifically around the first-generation Eclipse chassis rather than a generic application
If your goal is a 1989–1994 Mitsubishi Eclipse that feels more precise, controlled, and confidence-inspiring while remaining genuinely enjoyable on the street, the Spec-S provides the balance.
